class_docstr: Class which stores statistics about validation of the submissions.
code: def __init__(self):
      # dictionary mapping submission_type to tuple (num_success, num_fail)
      self.stats = {}
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import argparse
  import csv
  import logging
  import os
  import random
  import shutil
  import subprocess
  import tempfile
  from six import iteritems
  import validate_submission_lib
label_desc: Use image node_id 1 to create a new ValidationStats object from inherited base classes: object with example: obj = ValidationStats()